Head-to-head test
EcoFlow DELTA 2 Max vs EcoFlow RIVER 3 MAX PLUS WIRELESS
One of these is 20.8 lbs and rides in a tote bag; the other is 50.7 lbs, holds 852Wh more, and is the only one of the two that finishes an 8-hour blackout.
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
EcoFlow
DELTA 2 Max
4,071Power Score · Appliance Class
$949.00 list · direct from EcoFlow
EcoFlow
RIVER 3 MAX PLUS WIRELESS
2,887Power Score · Appliance Class
$599.00 list · direct from EcoFlow
Spec deltas
The DELTA 2 Max and RIVER 3 Max Plus Wireless are both EcoFlow, both rated for 3,000 cycles, and both back that with a 5-year warranty — the brand and the fine print are identical. What's different is size: 2,048Wh against 1,196Wh, 50.7 lbs against 20.8 lbs, $949 against $599.
That size gap decides four of the six scenarios we tested. An 8-hour blackout needs 1,645Wh: the DELTA covers it using 94% of its usable capacity, the RIVER needs 162% of what it's got and runs out before the night's over. Feed a CPAP, run a remote workday, or caterer a tailgate and both units clear it — but the RIVER is doing it on a noticeably thinner margin every time.
The one spec where the smaller unit wins outright is switchover speed: 10ms against the DELTA's 20ms. Neither is a bad buy — this is EcoFlow against itself, and the honest read is that the extra weight buys real headroom, unless what you actually need is something you can lift with one hand.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Capacity
$350 buys the DELTA 852Wh more capacity, and that's precisely the difference that lets it cover an 8-hour outage at 94% usage while the RIVER needs 162% of what it has and runs dry before morning.
DELTA 2 Max: 2,048Wh capacity, $949RIVER 3 Max Plus Wireless: 1,196Wh capacity, $5998-Hour Blackout needs 1,645Wh: DELTA uses 94% of usable capacity (covers it), RIVER needs 162% (runs out)
Why it mattersAnyone buying for a real multi-hour outage, not a weekend trip, should treat the $350 gap as the price of actually finishing the night, not an upsell.
continuous output
The RIVER's continuous output is a quarter of the DELTA's, 600W against 2,400W, and reviewers confirm it in practice — it won't run a hairdryer or a microwaveB4, the same way it isn't built to be carried by two people. It's built to be carried by one, including as a detachable mini power bank you leave the main unit behind forB6.
DELTA 2 Max: 50.7 lbs, 2,400W continuous / 4,800W surgeRIVER 3 Max Plus Wireless: 20.8 lbs, 600W continuous / 1,200W surgeReviewers note the RIVER won't run a hairdryer or microwaveB4, and its mini power bank detaches to carry soloB6
Why it mattersIf the loads you're running are laptop-and-CPAP scale, the RIVER's missing wattage never shows up and the lighter carry is pure upside; if you need to run tools or kitchen appliances, the DELTA's extra 29.9 lbs is the cost of the extra 1,800W.
cost / lifetime kWh
Cost per warranty year is just price divided by five identical years, so the cheaper unit always wins it — the RIVER, at $120 against $190. Cost per kWh divides price by the energy you actually get to use over that same identical warranty, and there the bigger battery wins — the DELTA, at $0.15 against $0.17.
DELTA 2 Max: $0.15 cost per lifetime kWh, $190 cost per warranty yearRIVER 3 Max Plus Wireless: $0.17 cost per lifetime kWh, $120 cost per warranty yearBoth: 5-year warranty, 3,000 cycles, 8.2 years at daily use
Why it mattersIf you'll actually cycle real energy through it, price the DELTA by its 15-cent-per-kWh; if the unit mostly sits ready for occasional short outages and rarely gets drawn down, the RIVER's lower sticker is the more honest number for your use.
The specific dimensions that decide these two units — everything else is a tie.
Portability & Form Factor
Selected because: 50.7 lbs vs 20.8 lbs is the physical fact that defines who buys which unit — establish it before anything else.
weight
Fifty point seven pounds is a two-hands lift; 20.8 is one-handed, into a tote bag, no ceremony. That's most of the personality difference between these two — the DELTA lives in a garage or an RV bay and gets wheeled into position once, the RIVER is the one you actually grab on your way out the door.
That lighter build isn't free. 20.8 lbs buys a 600W continuous inverter with a 1,200W surge, a quarter of the DELTA's 2,400W and 4,800W. The RIVER also breaks apart — a detachable mini power bank rides along separately so you're not hauling the whole station to go exploring a campsiteB6, something the sealed, one-piece DELTA can't do.
Your Life, Your Pick
Selected because: Four of six real-use scenarios split cleanly on capacity; shows exactly where the size gap bites and where it doesn't matter.
Four of six scenarios split on capacity alone. An 8-hour blackout needs 1,645Wh: the DELTA covers it using 94% of what it's got, the RIVER needs 162% of its usable capacity and runs out partway through the night. Feed a CPAP or run a remote workday and both units clear it, but the RIVER does it on a much thinner margin — 90% used on a workday alone against the DELTA's 52%.
The two scenarios neither unit clears — Weekend Camping's 2,100Wh ask and Van Life Daily's 4,685Wh ask — aren't close for either one. The RIVER needs more than four times its usable capacity for a full van-life day, the DELTA needs nearly three times its own. Anyone with loads that size is buying an expansion battery or a bigger class of unit, not choosing between these two.
Lifetime Value
Selected because: cheaperToOwn favors the DELTA per kWh, but cost-per-warranty-year favors the RIVER — worth surfacing both honestly.
cost / lifetime kWh
$0.15 per kWh over the DELTA's rated life against $0.17 for the RIVER — the bigger battery is also the cheaper one to actually run, not just the pricier one to buy.
Slice it by warranty year instead and the answer flips: $190 a year of DELTA coverage against $120 for the RIVER, because that math is just price divided by five identical years, not energy delivered. Both carry the same 5-year warranty and the same 3,000-cycle rating — 8.2 years of daily use before either one is expected to fade — so cost-per-warranty-year mostly measures which one cost less to buy. Cost per kWh measures what you get for the money, and if you'll actually draw the capacity down, that's the number that matters.
What the Specs Don't Tell You
Selected because: Only two gotchas fire — UPS switchover (RIVER faster) and warranty value (same tension as lifetime_value) — keep this tight.
The RIVER's switchover is 10 milliseconds, the DELTA's is 20 — twice as fast, and the only spec on this page where the smaller, cheaper unit is simply better, not just adequate. Owners report devices don't visibly blink on the handoffB5. For a lamp or a fridge, neither gap is noticeable; for a desktop PC or a hub running on no battery of its own, that's the difference between a flicker and a hard reboot.
Both units come with the same 5-year warranty, so 'better warranty' isn't really the question — the honest one is cost per year of that coverage, and the RIVER wins it at $120 against the DELTA's $190, simply for costing less upfront. It's not a better warranty. It's a cheaper box carrying an identical one.
Growth Path
Selected because: Both expand via EcoFlow batteries, but the 1,000W vs 200W solar ceiling is the real growth-path difference, relevant since both fail the biggest scenarios alone.
solar input
Both units expand on EcoFlow's own add-on batteries, so 'sealed forever' isn't a knock against either one. The real difference is how you refill the base unit while you wait on that add-on — the DELTA accepts up to 1,000W of solar, the RIVER tops out at 200W, a fifth as much.
That matters most exactly where both units already fail alone: Weekend Camping's 2,100Wh ask and Van Life Daily's 4,685Wh ask beat both of them on battery alone. Anyone actually living in those scenarios is expanding one of these units regardless, and the DELTA's larger solar intake means the expanded system refills off-grid in a fraction of the time.
Strengths & trade-offs
EcoFlow DELTA 2 Max
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$350) than the RIVER 3 MAX PLUS WIRELESS.
- –Significantly heavier (+29.9 lbs), making it harder to move.
EcoFlow RIVER 3 MAX PLUS WIRELESS
Strengths
- +Costs $350 less
- +Lighter by 29.9 lb
Trade-offs
- –Weaker inverter (-1,800W) limits appliance compatibility.
Will It Power Your Gear?
Scenario math and per-appliance runtimes, modeled from the spec record.
Scenario verdicts
We ran the math on six real-world scenarios. Here's which unit survives your actual life.
SCN-01 · 2 nights · needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
Neither unit
A real weekend of camping draws about 2,100Wh, more than either battery holds on its own. The DELTA comes closest, needing 121% of its usable capacity; the RIVER needs 207%. This is expansion-battery territory for both, not a pick-one-of-these-two question.
Battery budget usedlower = more headroom
LOAD Phone Charger 15W×6h · LED Lights 40W×8h · Box Fan 75W×14h · CPAP Machine 40W×16h
SCN-02 · 8 hours · needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
DELTA 2 Max
An 8-hour outage draws 1,645Wh. The DELTA covers it on 94% of its usable capacity, tight, but it finishes the night. The RIVER needs 162% of what it has and runs out before morning.
Battery budget usedlower = more headroom
LOAD Fridge 150W×8h · Router + Modem 20W×8h · LED Lights (4 bulbs) 40W×6h · Phone Charger 15W×3h
SCN-03 · 8 hours · needs 320Wh
CPAP Overnight
Sleep therapy without interruption — the #1 medical use case
DELTA 2 Max
A CPAP overnight draws just 320Wh, light enough that both units clear it easily, 18% used for the DELTA, 31% for the RIVER. Both get you through the night; the DELTA just has close to twice the cushion left over at sunrise.
Battery budget usedlower = more headroom
LOAD CPAP Machine 40W×8h
SCN-04 · 8 hours · needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
DELTA 2 Max
A remote workday draws 910Wh. The DELTA uses 52% of its capacity, leaving roughly half in reserve; the RIVER uses 90%, which covers the day but leaves almost nothing spare if it runs long.
Battery budget usedlower = more headroom
LOAD Laptop 60W×8h · External Monitor 30W×8h · Router + Modem 20W×8h · Phone Charger 15W×2h
SCN-05 · 4 hours · needs 670Wh
Tailgate Party
Game day power for the crew
DELTA 2 Max
A tailgate draws 670Wh. Both handle it, but not with the same room to spare, the DELTA uses 38% of its capacity against the RIVER's 66%, more than twice the cushion left for extra coolers or speakers.
Battery budget usedlower = more headroom
LOAD Blender 400W×0.5h · LED TV (55") 80W×4h · Bluetooth Speaker 15W×4h · Phone Charger (×3) 45W×2h
SCN-06 · 24 hours · needs 4,685Wh
Van Life Daily
A full day of mobile living — the ultimate endurance test
Neither unit
A full van-life day with no recharge draws 4,685Wh, far beyond either unit alone. The DELTA needs 269% of its usable capacity, the RIVER needs 461%. Both numbers point the same way: this load is what the expansion batteries are for, not something either base unit is meant to shoulder solo.
Battery budget usedlower = more headroom
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the six scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
For this load: DELTA 2 Max runs 8.5h vs 5h.
$949 list · direct from EcoFlow
Modeled from the spec record — same math as the tables below. Methodology
Runtime by appliance
Real-world runtime estimates for common appliances, modeled at 85% inverter efficiency.¹
Essentials
The basics you need runningscale 0–116.1hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–23.2hHigh-Draw Appliances
These reveal the real limitsscale 0–1.7h¹ Runtime = (capacity × 0.85) ÷ appliance watts. Within each group, all bars share one time scale (the group's longest runtime), so lengths are comparable across appliances; identical runtimes collapse into a single blue/orange bar. Actual runtime varies with battery age, temperature, and simultaneous loads — see methodology.
Conclusion
July 28, 2026
Verdict: the DELTA 2 Max, on Power Score margin
The DELTA 2 Max wins on the numbers that matter for actual outage prep: it clears four of six real-use scenarios outright, including an 8-hour blackout the RIVER can't finish, and it costs less per kWh delivered over its life ($0.15 against $0.17). The RIVER answers back with less than half the weight (20.8 lbs against 50.7), $350 off the price, and the only spec on this page that's simply better outright — a 10ms UPS switchover against 20ms, fast enough per field reports that connected devices don't blinkB5. Buy the DELTA if you're prepping for real outages and don't mind where it lives; buy the RIVER if you need to actually carry it and your loads stay laptop-and-CPAP scale.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 28, 2026. The links below open EcoFlow's current price.
$949.00 list · direct from EcoFlow
or check the RIVER 3 MAX PLUS WIRELESS price$599.00 list
Written by Ian Schneider, Solar & Off-Grid Tester · Station Arena Test Desk · Updated July 28, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): RV Living, Home Backup, Food Truck, Camping.
Full specifications
ᵈ Derived: price ÷ rated capacity. See the data behind our comparisons →
Comparison ToolAdd more power stations, side by sideOpen Tool →How these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it — no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews — see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity × 0.85 inverter efficiency) ÷ device wattage. Solar recharge estimates assume panels deliver 70% of rated output. Cold weather, battery age, and stacked loads reduce real-world results.
Power Score
Computed from 14 published spec dimensions, weighted per use-case bench. Higher is better; a unit must meet a bench's minimum threshold to be rated.
See the full weight table and data sourcing on our methodology page →Class ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews — no buyer opinions feed it. We score every station on size-independent quality (value, output, portability, endurance, ports, warranty, and more), then percentile-rank it against the other units in its capacity class, so a class-leading compact unit and a class-leading whole-home unit can both earn 5★. Here, DELTA 2 Max rates 3.9/5 (33rd percentile of 25 Large-class units), and RIVER 3 MAX PLUS WIRELESS rates 3.4/5 (9th percentile of 24 Everyday-class units).
How the class ranking is computed →Test Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
UPS Class: Line-Interactive Beats Standby
The RIVER 3 Max Plus Wireless switches over in 10 milliseconds, fast enough to count as line-interactive; the DELTA 2 Max takes 20ms, standard standby-class speed. Both are quick enough that a lamp or router never notices. A desktop tower or hub running on no internal battery of its own is where that gap is more likely to be the difference between riding through the transfer and rebooting.
Warranty Value: Same Coverage, Different Math
Both units carry an identical 5-year warranty over the same 3,000-cycle rating, about 8.2 years of daily use before either is expected to fade. Priced per year of that coverage, the RIVER is cheaper at $120 against the DELTA's $190, simply because it costs less to buy. Priced per kWh actually delivered over the same period, the DELTA is the cheaper one to own, at $0.15 against $0.17. Same warranty; different answer depending which cost you're asking about.
Full record above — the Test Desk pick is the DELTA 2 Max.
Check DELTA 2 Max price →or check the RIVER 3 MAX PLUS WIRELESS priceOwnership Analysis
What happens after you buy — true cost of ownership, brand trust, and growth potential.
Lifetime value
Service lifeyears at one full cycle per day
Lifetime energy delivered
Cost per delivered kWh
│ warranty ends · Reaching the cycle rating means ~80% capacity remains — degraded, not dead.
Analyst note
The RIVER 3 MAX PLUS WIRELESS is cheaper to buy, but the DELTA 2 Max is cheaper to own. At $0.15/kWh over its lifetime vs $0.17/kWh, the DELTA 2 Max's higher cycle life and capacity make each dollar go further over the years.
Growth path
DELTA 2 Max
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 2,048Wh.
Accepts up to 1,000W of solar. Enough for a serious multi-panel array.
Generous port selection supports complex multi-device setups.
Expansion batteries are EcoFlow-specific. You're investing in the EcoFlow ecosystem.
RIVER 3 MAX PLUS WIRELESS
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 1,196Wh.
Accepts up to 200W of solar. Limited to a single portable panel.
Adequate ports for most setups, but heavy users may want a power strip.
Expansion batteries are EcoFlow-specific. You're investing in the EcoFlow ecosystem.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Both expand, but the DELTA 2 Max's higher solar ceiling (1,000W vs 200W) gives it the stronger off-grid growth path — more panels can feed a bigger bank as it grows.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 2 Max
Six months in, owners report no structural degradation — the LiFePO4 cells still feel as solid as day oneA3, and the fast AC charging holds up as a real strength rather than a spec-sheet numberA2.
The recurring complaint is fan noise under heavy load or while fast-charging, loud enough that reviewers recommend using Quiet Charging mode and leaving 6 inches of clearance for airflowA1. Reviewers still call it worth buying, caveats included, largely for the expandability and ecosystem fitA4.
“Fast AC wall charging — 0 to 80% in about 50 minutes and a full charge in roughly 80 minutes.”
Sources
powerstationadvisor.com · pcworld.com · thesolarlab.com · protoolsadvisor.com · trailandkale.com
EcoFlow RIVER 3 MAX PLUS WIRELESS
This is a very recently released configuration, so field data is thin — most of what exists comes from early reviews rather than long-term owner reports. What's there is consistent: reviewers call the RIVER 3 line quiet, measuring it at 30 dB in practiceB2, and note the UPS switchover is fast enough that connected devices don't visibly blinkB5.
Recharge from empty is fast for its capacityB1, and at least one reviewer treats the detachable mini power bank as a genuine feature, something to grab solo without hauling the whole station alongB6. The tradeoff is capped output: reviewers are upfront that it won't run a hairdryer or microwave, same as most units below the big Delta-class invertersB4.
“The RIVER 3 Max Plus (Wireless) can go from empty to full from mains in around 2.3 hours, which is very quick given its capacity.”
Sources
root-nation.com · backuppowerhub.com
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- Solid LFP durability, fast charging, and ecosystem/expandability are the praise; loud fans under heavy load or charging are the recurring complaint. [DELTA 2 Max · 3 entries]
- Reviewers consistently praise the low fan noise (~30dB) as suitable for bedroom/overnight use. [RIVER 3 MAX PLUS WIRELESS · 4 entries]
- The UPS/fast-recharge combination is repeatedly cited as a practical real-world benefit for remote work and campsite hookups. [RIVER 3 MAX PLUS WIRELESS · 2 entries]
- A1
“Fan noise is a significant issue — cooling fans can get loud, around 52 dB during heavy loads or charging; a Quiet Charging mode reduces noise but extends charge time, and giving it 6 inches of clearance helps airflow.”
powerstationadvisor.com / pcworld.com — DELTA 2 Max review · 2025-2026 · [negative]
- A2
“Fast AC wall charging — 0 to 80% in about 50 minutes and a full charge in roughly 80 minutes.”
thesolarlab.com / protoolsadvisor.com — DELTA 2 Max review · 2025-2026 · [positive]
- A3
“LiFePO4 chemistry rated for 3,000+ cycles to 80% with superior thermal stability; after 6 months of real use there was no structural degradation and it felt as solid as day one.”
powerstationadvisor.com / trailandkale.com — DELTA 2 Max review · 2025-2026 · [positive]
- A4
“Reviewers say it's still worth buying but with caveats — a versatile unit with expandability and ecosystem compatibility.”
thesolarlab.com / powerstationadvisor.com — DELTA 2 Max review · 2025-2026 · [mixed]
- B1
“The RIVER 3 Max Plus (Wireless) can go from empty to full from mains in around 2.3 hours, which is very quick given its capacity.”
Wandering Bird blog — 'REVIEW: Ecoflow River 3 Max Plus- vanlife essential or not?' · 2025-11 · [positive]
- B2
“The RIVER 3 Series is quiet. Very quiet. It's listed as only making 30dB.”
Wandering Bird blog — 'REVIEW: Ecoflow River 3 Max Plus- vanlife essential or not?' · 2025-11 · [positive]
- B4
“It won't run a high-power hairdryer or microwave, but that's true for most portable power stations unless you go for one of the big Delta units.”
Wandering Bird blog — 'REVIEW: Ecoflow River 3 Max Plus- vanlife essential or not?' · 2025-11 · [mixed]
- B5
“UPS (Uninterruptible Power Supply) switching on the RIVER 3 Plus/Max models is under 10 milliseconds... your devices won't suddenly power off.”
Wandering Bird blog — 'REVIEW: Ecoflow River 3 Max Plus- vanlife essential or not?' · 2025-11 · [positive]
- B6
“Use the mini power bank separately when you're out exploring, without taking the entire Ecoflow unit with you.”
Wandering Bird blog — 'REVIEW: Ecoflow River 3 Max Plus- vanlife essential or not?' · 2025-11 · [positive]
Research compiled July 28, 2026.
Who Should Buy Which
Buy the DELTA 2 Max if you…
- →You're prepping for real multi-hour outages, not weekend trips — the DELTA clears an 8-hour blackout at 94% usage and the RIVER doesn't.
- →You want the stronger off-grid growth path: 1,000W of solar input means an expanded setup refills in a morning instead of taking all day.
- →The unit lives in one place, a garage, a closet, an RV bay, and gets wheeled into position rather than carried daily, so 50.7 lbs is a non-issue.
Buy the RIVER 3 MAX PLUS WIRELESS if you…
- →You're actually carrying this thing, to a tailgate, a job site, a campsite, and 20.8 lbs one-handed beats 50.7 lbs every time you have to move it.
- →Your loads top out at laptops, phones, and a CPAP — the 600W continuous rating never becomes a ceiling you hit.
- →You want the fastest failover for something sensitive, like a desktop with no battery of its own — the RIVER's 10ms switchover is the quickest spec on this pageB5.
If neither fits
If your actual draw looks like Weekend Camping (2,100Wh) or a full Van Life Daily (4,685Wh) with no recharge, neither base unit gets you through solo — you're either buying an EcoFlow expansion battery for whichever one you pick, or looking at a larger single unit built for that load from the start.
The Bottom Line
$949 buys 2,048Wh, a 1,000W solar ceiling, and an 8-hour blackout cleared at 94% usage, a night the $599, 20.8-lb RIVER can't finish, needing 162% of what it's got.
Both are EcoFlow, both carry a 5-year warranty, and neither survives Weekend Camping's 2,100Wh ask alone, so this was never a brand fight. It's capacity against carry-weight, and for the scenarios this page actually tested, the extra weight earns its keep. Take the DELTA, and treat the $350 as the cost of a full night's sleep through the next blackout.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the EcoFlow DELTA 2 Max worth $350 more than the RIVER 3 Max Plus Wireless?
If you need it to cover a real multi-hour outage, yes — the DELTA covers an 8-hour blackout using 94% of its usable capacity while the RIVER needs 162% and runs out. It's also the cheaper of the two to actually run, at $0.15 per lifetime kWh against $0.17. If your loads are laptop-and-phone scale and weight matters more than headroom, the RIVER's $599 price and 20.8 lbs are the better trade.
Can either the DELTA 2 Max or the RIVER 3 Max Plus Wireless handle a full weekend of camping?
Not on battery alone. A real weekend of camping draws around 2,100Wh, and the DELTA would need 121% of its usable capacity to cover it while the RIVER would need 207% — both run out first. Either one needs an EcoFlow expansion battery, or a generator backup, to make it through solo.
Which one has the faster power-outage switchover?
The RIVER, at 10 milliseconds against the DELTA's 20 — the only spec on this page where the smaller, cheaper unit is simply better outright. Both are fast enough that a lamp or router won't notice; a desktop tower or hub with no internal battery is where the RIVER's shorter gap can matter.
Is the DELTA 2 Max's fan noise actually a problem?
It's the recurring complaint in reviews — fans get loud under heavy load or while fast-charging, enough that owners recommend using Quiet Charging mode and leaving 6 inches of clearance for airflow. It isn't a dealbreaker on its own, but it's the honest tradeoff for the DELTA's bigger inverter and faster charging.
Where to buy
EcoFlow DELTA 2 MaxPick
$949.00
$949.00 list · direct from EcoFlow
EcoFlow RIVER 3 MAX PLUS WIRELESS
$599.00
$599.00 list · direct from EcoFlow
Prices may vary by retailer and are subject to change.